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Scope:

This Guidance primarily applies to Adhesion Management Systems
for lines operated in ATO. It can also be used for lines where the
trains are driven manually. It is therefore applicable to all of
the following:-

• Definition, development, specification and implementation of
the required Adhesion Management system to enable the introduction
of ATO on any open section of the LU network

o A significant change is made to the line characteristics (e.g.
extensive vegetation work, enhanced timetable

• The review, development, modification or enhancement of an
existing Adhesion Management system due to unsatisfactory
performance on a line. "Unsatisfactory performance" could
mean:-

o An unacceptablly high number of overruns in service o One or
more unacceptably long overruns in service

o An unacceptably high level of wheel damage (wheel flats or
pitting)

o An unacceptably high level of rail damage

The aim of this guidance is to outline a consistent and
integrated approach to Adhesion Management Systems in London
Underground.

This guidance document explains the reasoning behind the
requirements mandated by the Category 1 "Variable Adhesion
Conditions - Requirements for the Implementation of ATO on anyOpen Sectionsof the LU Network" Standard (S1189)
and offers guidance on the best practice approach for achieving
compliance with this Standard.

The guidance document also explains, where relevant, the current
strategic approach to Adhesion Management in London Underground (as
at the date of issue of this document). Note this document is
planned for review two years after the issue date in recognition of
the need to incorporate experience gained from the Adhesion
Management Systems implemented or which will be implemented in the
near future to enable the implementation of ATO on additional open
sections.

Sections of the AMS Category 1 Standard (S1189) are quoted in
appropriate sections within this guidance document.